Sound-box.



H A. MYERS.

SOUND BOX.

APPLICATION FILEDJULY 22.1915.

Patented July 24, 1917;

. fig-1.5

HUBERI' A. MYERS, OFTOLEDO, OHIO, ASSIGNOR TO HARVEY F. BANTA, 0FGUSHEN',

' 1 INDIANA.

SOUND-BOX.

Specification of Letters Patent.

Patented July 241, twill.

Application filed July 22, 1915. Serial No. 41,241.

To all whom it may; concern:

Be it known that I, Hnnnn'r A. Mrnns, a citizen of the United States ofAmerica, residing at Toledo, Lucas county, Ohio, have invented new anduseful SoundBoxes, of which the following is a specification.

This invention relates to vibration transmitting needles and theconnections there from. t

This invention has utility when incorporated in tone producing andreproducing devices, as talklng machines.

Referring to the drawings:

Figure 1 is a fragmentary side elevation of a talking machine embodyingthe invention;

Fig. 2 is a View from the left of Fig. 1, with parts broken away;

Fig. 3 is a section on the line IIL-III, Fig. 2, looking in thedirection of the arrow, with the valve adjusted to open partially theduct;

Fig. 4 is an enlarged fragmentary detail of a needle lever fulcrum ormounting as to the sound box;

Fig. 5 is a fragmentaryview of the lever from the left of Fig. 4, withparts broken away to show the needle mounting in the lever; and Fig. 6is a plan view of the valve indicator.

The hollow talking machine arm or duct 1 extends to the sound box casingor housing 2 which carries the needle or stylus 3 in position as to therecord 4.

In the duct 1 adjacent the housing 2 is the valve 5 readily adjustableby rotation to restrict the cross-section or effective area of the duct1 at a point adjacent the diaphragm 6 in the sound box or housing 2. Byproviding this adjustment, the volume or carrying range of the machinein reproducing may be reduced, but the tones preserved as to delicacy oftimber and pitch without introducing any hollow or muffling sounds.

Adherent to the diaphragm 6 by cemented rubber or sound deadening pad 7is the lever 8. This connection of the lever 8 to the diaphragm iscentral as to the dia phragm.

"eliminates machine with the reproductlon tones.

The lever 8 has at its fulcrum the opposing notches 9 (shown in end viewFig. 4: and side View Fig. 5) engaged by the knife edge bearings 10,each cemented to a rubber or sound deadening pad 11, pressed into theopposing seats 12 from the housing or sound box 2.

Centrally disposed as to the fulcrum bearing 10, 10,'the lever 8 hasrecess 14 in which may be a short section of rubber tube or sounddeadening pad 15. Forced into this recess 14 and held locked therein bythis rubber 15 is the holder or quill 16 for the needle 3, which may beadjustably mounted and held in position by the set screw 17.

The mechanical sounds of the moving parts of the device are effectivelychecked iiriom transmission to the mechanism herein.

1e mum of resistance and leaves the needle most sensitive for vibration.The action of the rubber or resilient non-resonant means 11 isthree-fold: (1) in mounting the knife edges,

(2) in taking up lost motion, and (3) in deadening transmission ofmechanical noises of the apparatus. The sound deadener 15 noises frommingling The pads 11 tend to prevent any noises from the quick action.of the lever 8 getting to the sound box from this source, while the pad7 simi larly acts between the lever 8 and the diaphragm 6.

The valved duct 1 tone volume.

What is claimed and it is desired to secure by Letters Patent is:

permits easy control of of the arms 13 extending.

1. A sound reproducer having a casing said mounting comprising providedon one side thereof with a pair of rubber means between the knife edgesand 4 lugs, a '(li'aphragm for the casing, and a the lugs compressibletherein as a resilient stylus lever having a mounting on saidcasnon-resonant mounting for resiliently hold- 10 ing and connected withthe diaphragm, said ing the lever in position and insulating it 5mounting vcomprising a pair of opposing from the casing. I I

knife ed es; said pair of opposing knife In Witness whereof Iaifix mysignature. edges bemg mounted upon said lugs, and HUBERT A. MYERS.

